The general solution x for the equation ...

The general solution x for the equation `9 ^(cos x) - 2.3^(cos x ) + 1 = 0 ` is

A

`n pi, n in Z`

B

`n pi //2 , n in Z`

C

`2 n pi, n in Z`

D

`(2 n + 1) pi//2 , n in Z`

लिखित उत्तर

Verified by Experts

The correct Answer is:

D

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